/Engine/Source/Editor/SequencerCore/Public/MVVM/Selection/SequencerCoreSelection.h
Retrieve a scoped object that will suppress selection events for the duration of its lifetime. This function should only be used for longer running suppression such as those as part of a mouse-down operation. The suppressor can be destroyed by resetting the unique pointer
[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [FSelectionEventSuppressor](API\Editor\SequencerCore\MVVM\Selection\FSelectionEventSuppressor) > SuppressEventsLongRunning()